Yeah, going to go ahead and disagree with you there. You can play terrible decks and win in MTG too - even the most dominating decks rarely post better than 60-65% vs. the field. In fact, I would say that standard W:I is a much worse format than MTG standard right now, because of Bolt Thrower's choke hold on the format, and don't even compare it to MTG Legacy for number of viable archetypes...
If your complaint is "Min/maxing 'Spike' types shrink the card pool" well... fine, but thats a CCG/LCG-wide complaint not limited to one game. OTOH Single set for W:I does alleviate that to a degree by forcing you to play more cards - but on that point, my biggest concern with banning the "power 9" (see what I did there?) of 3x Warpstone/3x Innovation/3x Contested Village right now in single set is that the dropoff in card quality would be enormous. We're already teetering right on the precipice playing 41 other cards; including 9 more means playing some real drek.